OFFSET
0,3
FORMULA
a(n)=Sum{floor(kn/7), k=1,2,3,4,5,6}.
Empirical g.f.: 3*x^2*(2*x^5 +x^4 +x^3 +x^2 +x +1) / ((x-1)^2*(x^6 +x^5 +x^4 +x^3 +x^2 +x +1)). - Colin Barker, Mar 20 2013
MATHEMATICA
Table[Sum[Floor[k*n/7], {k, 1, 6}], {n, 0, 120}
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Mar 08 2011
STATUS
approved